This posting is older than 6 months and can contain outdated information.
Thanks for asking.
Remote Buddy itself doesn't contain any code that would be able to
cause that effect. The Wii Remote can't cause this either. This
strongly looks like a hardware or OS X problem.
I believe this line to be the key to the solution:
* D-Link DMB-120 (Rev B3) USB bluetooth adapter, connected via a 4-
port USB hub.
Why?
a) You don't use an Apple Bluetooth adapter. While there is a standard
for Bluetooth devices and usually using third party adapters works
well, not every Bluetooth device may implement it exactly as the Apple
Bluetooth driver stack expects and thus cause problems. I don't think
that's the problem here, but I think it's worth mentioning. (BTW: do
you mean the DBT-120 by any chance? That model is specified for USB
1.1 and USB 2.0 by D-Link. I couldn't find any reference to a DMB-120
anywhere on the web, though).
b) You connect the Bluetooth adapter through a USB hub. Try connecting
it directly to a USB port on your Mac Mini. My experience so far has
been that not all USB devices work equally well on all hubs. My best
guess as to why is that either the USB device in question doesn't get
enough power to run correctly or OS X has a problem with the hub
itself. I strongly expect that the OS X USB stack (or an instance of a
hub class of it in the kernel) is hanging here, as essentially your
entire problem comes down to a USB problem. If USB stops working, the
USB IR receiver, the USB keyboard and mouse as well as the USB
Bluetooth stick (and thus also the Bluetooth stack) - all devices you
mentioned - no longer have any means of communication and will
naturally stop working, too. Your mention that screen sharing still
works adds to that theory.
Suggested solution:
Remove the Bluetooth adapter from the USB hub and plug it directly to
a USB port on your Mac.
Best regards,
Felix Schwarz